// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_GFX_PLATFORM_FONT_MAC_H_
#define UI_GFX_PLATFORM_FONT_MAC_H_

#include "base/compiler_specific.h"
#include "base/mac/scoped_nsobject.h"
#include "base/macros.h"
#include "ui/gfx/font_render_params.h"
#include "ui/gfx/platform_font.h"

namespace gfx {

class PlatformFontMac : public PlatformFont {
public:
    PlatformFontMac();
    explicit PlatformFontMac(NativeFont native_font);
    PlatformFontMac(const std::string& font_name,
        int font_size);

    // Overridden from PlatformFont:
    Font DeriveFont(int size_delta, int style) const override;
    int GetHeight() override;
    int GetBaseline() override;
    int GetCapHeight() override;
    int GetExpectedTextWidth(int length) override;
    int GetStyle() const override;
    const std::string& GetFontName() const override;
    std::string GetActualFontNameForTesting() const override;
    int GetFontSize() const override;
    const FontRenderParams& GetFontRenderParams() override;
    NativeFont GetNativeFont() const override;

private:
    PlatformFontMac(const std::string& font_name, int font_size, int font_style);
    ~PlatformFontMac() override;

    // Calculates and caches the font metrics and inits |render_params_|.
    void CalculateMetricsAndInitRenderParams();

    // The NSFont instance for this object. If this object was constructed from an
    // NSFont instance, this holds that NSFont instance. Otherwise this NSFont
    // instance is constructed from the name, size, and style, and if there is no
    // active font that matched those criteria, this object may be nil.
    base::scoped_nsobject<NSFont> native_font_;

    // The name/size/style trio that specify the font. Initialized in the
    // constructors.
    std::string font_name_; // Corresponds to -[NSFont fontFamily].
    int font_size_;
    int font_style_;

    // Cached metrics, generated in CalculateMetrics().
    int height_;
    int ascent_;
    int cap_height_;
    int average_width_;

    // Details about how the font should be rendered.
    FontRenderParams render_params_;

    DISALLOW_COPY_AND_ASSIGN(PlatformFontMac);
};

} // namespace gfx

#endif // UI_GFX_PLATFORM_FONT_MAC_H_
